Lord Fulabunk was recounting one of his many hunting expeditions to a group of colleagues. 'I was deep in a jungle, in the Congo. The air was thick and musky. Sweat dripped from my brow and my fellow hunters had already decided to give up and return to camp, but I was determined to capture our prey. Suddenly, I heard a snap of a twig from behind me. As I reeled around, I shot a huge tiger dead as it leapt to devour me! And that is how I came upon this fine trophy you see hanging on my wall here.'
'Nonsense!', cried Baron Knowital, 'Your story is nothing but a fabrication!'
How did Baron Knowital know that Lord Fulabunk's tale was false?

Yeah, where the heck do people come up w/ such weird names But yes, these ones where someone is being called a liar for one reason or another are a bit too easy. Even if you don't know the facts, you can assume that tigars don't live where he claims he shot one.